In the world, Groell (Groell 
) is an extremely rare unknown gender first name. Much more prevalently, Groell is the last name as well as the forename.
Mr, Paige, Penny, Peggy, Roger, David, Diane, Laura, Ladda, Louis, Kevin, Jacob, Nancy, Nelly, Erich, Frank, Wendy, Martin, Markus, Sandra, Sabine, Julie, Kelly, Kathy, Cindy, Ms, Ana, Ann, Marc, Mary, Anne, Paul, Rene, Rita, Dawn, Jake, John, Jody, Jean, Tess, Niza, Eric, Manon, Sarah, Sonja, Alain, Susana, and Steven